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<title>module Process::Sys - RDoc Documentation</title>


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  <h3>Methods</h3>

  <ul class="link-list" role="directory">
    <li ><a href="#method-c-getegid">::getegid</a>
    <li ><a href="#method-c-geteuid">::geteuid</a>
    <li ><a href="#method-c-getgid">::getgid</a>
    <li ><a href="#method-c-getuid">::getuid</a>
    <li ><a href="#method-c-issetugid">::issetugid</a>
    <li ><a href="#method-c-setegid">::setegid</a>
    <li ><a href="#method-c-seteuid">::seteuid</a>
    <li ><a href="#method-c-setgid">::setgid</a>
    <li ><a href="#method-c-setregid">::setregid</a>
    <li ><a href="#method-c-setresgid">::setresgid</a>
    <li ><a href="#method-c-setresuid">::setresuid</a>
    <li ><a href="#method-c-setreuid">::setreuid</a>
    <li ><a href="#method-c-setrgid">::setrgid</a>
    <li ><a href="#method-c-setruid">::setruid</a>
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    <main role="main" aria-labelledby="module-Process::Sys">
    <h1 id="module-Process::Sys" class="module">
      module Process::Sys
    </h1>

    <section class="description">
    
<p>The <a href="Sys.html"><code>Process::Sys</code></a> module contains <a href="UID.html"><code>UID</code></a> and <a href="GID.html"><code>GID</code></a> functions which provide direct bindings to the system calls of the same names instead of the more-portable versions of the same functionality found in the <a href="../Process.html"><code>Process</code></a>, <a href="UID.html"><code>Process::UID</code></a>, and <a href="GID.html"><code>Process::GID</code></a> modules.</p>

    </section>

      <section id="5Buntitled-5D" class="documentation-section">





                <section id="public-class-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Class Methods</h3>
                </header>

                  <div id="method-c-getegid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          egid        &rarr; integer
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::GID.eid    &rarr; integer
                              </span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.geteid &rarr; integer
                              </span>
                            </div>

                            <div class="method-description">
                              <p>Returns the effective group ID for the current process:</p>

<pre class="ruby"><span class="ruby-constant">Process</span>.<span class="ruby-identifier">egid</span> <span class="ruby-comment"># =&gt; 500</span>
</pre>

<p>Not available on all platforms.</p>

                              <div class="method-source-code" id="getegid-source">
            <pre>static VALUE
proc_getegid(VALUE obj)
{
    rb_gid_t egid = getegid();

    return GIDT2NUM(egid);
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-geteuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          euid         &rarr; integer
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::UID.eid     &rarr; integer
                              </span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.geteuid &rarr; integer
                              </span>
                            </div>

                            <div class="method-description">
                              <p>Returns the effective user ID for the current process.</p>

<pre class="ruby"><span class="ruby-constant">Process</span>.<span class="ruby-identifier">euid</span> <span class="ruby-comment"># =&gt; 501</span>
</pre>

                              <div class="method-source-code" id="geteuid-source">
            <pre>static VALUE
proc_geteuid(VALUE obj)
{
    rb_uid_t euid = geteuid();
    return UIDT2NUM(euid);
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-getgid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          gid         &rarr; integer
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::GID.rid    &rarr; integer
                              </span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.getgid &rarr; integer
                              </span>
                            </div>

                            <div class="method-description">
                              <p>Returns the (real) group ID for the current process:</p>

<pre class="ruby"><span class="ruby-constant">Process</span>.<span class="ruby-identifier">gid</span> <span class="ruby-comment"># =&gt; 1000</span>
</pre>

                              <div class="method-source-code" id="getgid-source">
            <pre>static VALUE
proc_getgid(VALUE obj)
{
    rb_gid_t gid = getgid();
    return GIDT2NUM(gid);
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-getuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          uid         &rarr; integer
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::UID.rid    &rarr; integer
                              </span>
                            </div>
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.getuid &rarr; integer
                              </span>
                            </div>

                            <div class="method-description">
                              <p>Returns the (real) user ID of the current process.</p>

<pre class="ruby"><span class="ruby-constant">Process</span>.<span class="ruby-identifier">uid</span> <span class="ruby-comment"># =&gt; 1000</span>
</pre>

                              <div class="method-source-code" id="getuid-source">
            <pre>static VALUE
proc_getuid(VALUE obj)
{
    rb_uid_t uid = getuid();
    return UIDT2NUM(uid);
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-issetugid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.issetugid   &rarr; true or false
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Returns <code>true</code> if the process was created as a result of an execve(2) system call which had either of the setuid or setgid bits set (and extra privileges were given as a result) or if it has changed any of its real, effective or saved user or group IDs since it began execution.</p>

                              <div class="method-source-code" id="issetugid-source">
            <pre>static VALUE
p_sys_issetugid(VALUE obj)
{
    return RBOOL(issetugid());
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setegid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setegid(group)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the effective group ID of the calling process to <em>group</em>.  Not available on all platforms.</p>

                              <div class="method-source-code" id="setegid-source">
            <pre>static VALUE
p_sys_setegid(VALUE obj, VALUE id)
{
    check_gid_switch();
    if (setegid(OBJ2GID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-seteuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.seteuid(user)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the effective user ID of the calling process to <em>user</em>.  Not available on all platforms.</p>

                              <div class="method-source-code" id="seteuid-source">
            <pre>static VALUE
p_sys_seteuid(VALUE obj, VALUE id)
{
    check_uid_switch();
    if (seteuid(OBJ2UID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setgid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setgid(group)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the group ID of the current process to <em>group</em>. Not available on all platforms.</p>

                              <div class="method-source-code" id="setgid-source">
            <pre>static VALUE
p_sys_setgid(VALUE obj, VALUE id)
{
    check_gid_switch();
    if (setgid(OBJ2GID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setregid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setregid(rid, eid)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Sets the (group) real and/or effective group IDs of the current process to <em>rid</em> and <em>eid</em>, respectively. A value of <code>-1</code> for either means to leave that ID unchanged. Not available on all platforms.</p>

                              <div class="method-source-code" id="setregid-source">
            <pre>static VALUE
p_sys_setregid(VALUE obj, VALUE rid, VALUE eid)
{
    rb_gid_t rgid, egid;
    check_gid_switch();
    rgid = OBJ2GID(rid);
    egid = OBJ2GID(eid);
    if (setregid(rgid, egid) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setresgid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setresgid(rid, eid, sid)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Sets the (group) real, effective, and saved user IDs of the current process to <em>rid</em>, <em>eid</em>, and <em>sid</em> respectively. A value of <code>-1</code> for any value means to leave that ID unchanged. Not available on all platforms.</p>

                              <div class="method-source-code" id="setresgid-source">
            <pre>static VALUE
p_sys_setresgid(VALUE obj, VALUE rid, VALUE eid, VALUE sid)
{
    rb_gid_t rgid, egid, sgid;
    check_gid_switch();
    rgid = OBJ2GID(rid);
    egid = OBJ2GID(eid);
    sgid = OBJ2GID(sid);
    if (setresgid(rgid, egid, sgid) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setresuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setresuid(rid, eid, sid)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Sets the (user) real, effective, and saved user IDs of the current process to <em>rid</em>, <em>eid</em>, and <em>sid</em> respectively. A value of <code>-1</code> for any value means to leave that ID unchanged. Not available on all platforms.</p>

                              <div class="method-source-code" id="setresuid-source">
            <pre>static VALUE
p_sys_setresuid(VALUE obj, VALUE rid, VALUE eid, VALUE sid)
{
    rb_uid_t ruid, euid, suid;
    PREPARE_GETPWNAM;
    check_uid_switch();
    ruid = OBJ2UID1(rid);
    euid = OBJ2UID1(eid);
    suid = OBJ2UID1(sid);
    FINISH_GETPWNAM;
    if (setresuid(ruid, euid, suid) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setreuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setreuid(rid, eid)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Sets the (user) real and/or effective user IDs of the current process to <em>rid</em> and <em>eid</em>, respectively. A value of <code>-1</code> for either means to leave that ID unchanged. Not available on all platforms.</p>

                              <div class="method-source-code" id="setreuid-source">
            <pre>static VALUE
p_sys_setreuid(VALUE obj, VALUE rid, VALUE eid)
{
    rb_uid_t ruid, euid;
    PREPARE_GETPWNAM;
    check_uid_switch();
    ruid = OBJ2UID1(rid);
    euid = OBJ2UID1(eid);
    FINISH_GETPWNAM;
    if (setreuid(ruid, euid) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setrgid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setrgid(group)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the real group ID of the calling process to <em>group</em>. Not available on all platforms.</p>

                              <div class="method-source-code" id="setrgid-source">
            <pre>static VALUE
p_sys_setrgid(VALUE obj, VALUE id)
{
    check_gid_switch();
    if (setrgid(OBJ2GID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setruid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setruid(user)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the real user ID of the calling process to <em>user</em>. Not available on all platforms.</p>

                              <div class="method-source-code" id="setruid-source">
            <pre>static VALUE
p_sys_setruid(VALUE obj, VALUE id)
{
    check_uid_switch();
    if (setruid(OBJ2UID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-c-setuid" class="method-detail ">
                      <div class="method-heading">
                        <span class="method-callseq">
                          Process::Sys.setuid(user)   &rarr; nil
                              </span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Set the user ID of the current process to <em>user</em>. Not available on all platforms.</p>

                              <div class="method-source-code" id="setuid-source">
            <pre>static VALUE
p_sys_setuid(VALUE obj, VALUE id)
{
    check_uid_switch();
    if (setuid(OBJ2UID(id)) != 0) rb_sys_fail(0);
    return Qnil;
}</pre>
                              </div>
                            </div>


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